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A random sample of 49 selected from a population with a standard deviation of 14 yielded a mean = 125. The mean and the standard deviation of the distribution of the sample means are ____________ .
125 and 2
125 and 49
120 and 2
125 and 1.33
125 and 14
Suppose Fuzzy, a quantum-mechanical duck, lives in a world in which h = 2?J · s. Fuzzy has a mass of 2.25 kg, What is the minimum uncertainty in the duck's speed
A cylinder rolls without slipping down an incline that makes a 57° angle with the horizontal. What is the acceleration of the cylinder
A 2.5-m-long steel wire in a musical instrument has a radius of 0.02 mm. When the wire is under a tension of 91 N, how much does its length change
A 2.30-? F capacitor is fully charged by being connected to a 6.0-V battery. The fully charged capacitor is then connected to a 0.250-H inductor.
An air conditioner connected to a 105 V rms ac line is equivalent to a 13.4 capital omega resistance and a 1.18 capital omega inductive reactance in series. What is the impedence of the air conditioner
Water is being pumped 100 meters up a hill through a hose at a rate of .012m^s/s. what is the water pressure at the bottom of the hose
A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 12.0 cm, giving it a charge of -15.0 microC. find the electric field: (a) just inside the paint layer, b) just outside the paint layer and c) 5..
A satellite is in a circular orbit about the earth (ME = 5.98 1024 kg). What is the speed at which the satellite travels
Green light (555 nm) is normally incident on a pair of slits which are 12mircometers apart. How many interference fringes will there be
A 0.60 kg stone attached to a string is whirled in a horizontal circle of radius 43 cm as in the figure below. The string makes an angle of 35° with the vertical. Find the speed of the stone
A string is wrapped around a wheel of radius 0.4 m and moment of inertia 25 kg-m2. If the string is pulled with a force of 60 N, what is the angular acceleration of the wheel
A trunk of mass m = 1.800 kg is pushed a distance d = 185 cm up an incline with an angle of inclination theta = 25.0 ° by a constant horizontal force P = 300. N, Calculate the work done on the trunk by the frictional force
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